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  GBase8s库迁移到GBase8s
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  <h1 id="GBase8s-库迁移到-GBase8s"><a href="#GBase8s-库迁移到-GBase8s" class="headerlink" title="GBase8s 库迁移到 GBase8s"></a>GBase8s 库迁移到 GBase8s</h1><p> 注意：这种通过dbschema迁移方法的，要把结构sql文件拆成2份，先建表然后直接导入数据，然后迁移后面的其他部分。应为多表约束有先后顺序，序列值好像不用管会记录当前值并alter。有跨库查询的这里不考虑。</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta prompt_">#</span><span class="language-bash">0、 全实例备份  安全先行</span></span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">迁移目录</span></span><br><span class="line">mkdir -p /db/app02/trey_qy</span><br><span class="line">cd /db/app02/trey_qy</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">01 库结构</span></span><br><span class="line">dbschema -d picc95518 -ss ww_db.sql</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">02 分离得到：建表语句、其他语句（不要用脚本最好手动拆分）</span></span><br><span class="line">cat ww_db.sql |sed -n &#x27;1,9714p&#x27; &gt; ww_db_tab.sql</span><br><span class="line">cat ww_db.sql |sed    &#x27;1,9714d&#x27; &gt; ww_db_oth.sql</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">03 创建目标库，目标表</span></span><br><span class="line">dbaccess sysmaster &lt;&lt;!</span><br><span class="line">create database wwqydb in car3gdbs;</span><br><span class="line">!</span><br><span class="line">dbaccess wwqydb ww_db_tab.sql  #如果需要修改extend大小修改完成再执行。</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">04 确定表列表</span></span><br><span class="line">dbaccess picc95518 &lt;&lt;!</span><br><span class="line">unload to qy_tab_list.o</span><br><span class="line">select tabname from systables where tabid&gt;99 and tabtype=&#x27;T&#x27;;</span><br><span class="line">!</span><br><span class="line">dbaccess wwqydb &lt;&lt;!</span><br><span class="line">unload to qy_tab_list.n</span><br><span class="line">select tabname from systables where tabid&gt;99 and tabtype=&#x27;T&#x27;;</span><br><span class="line">!</span><br><span class="line">diff qy_tab_list.o qy_tab_list.n</span><br><span class="line">如果对比结果一样，正面表列表正确。</span><br><span class="line">cat qy_tab_list.o |sed &#x27;s/|$//&#x27; &gt; qy_tab_list</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">05 老库创建外部表，导出数据  -----------------------------------------  导出耗时： real    32:49.0    33分钟</span></span><br><span class="line">rm -fr   /db/app02/trey_qy/external_table</span><br><span class="line">mkdir -p /db/app02/trey_qy/external_table</span><br><span class="line"></span><br><span class="line">cat qy_tab_list |while read qytab</span><br><span class="line">do</span><br><span class="line">echo &quot;---  $qytab  -----------------------------------------------------------------------------------------&quot;</span><br><span class="line">time dbaccess picc95518 &lt;&lt;!</span><br><span class="line">drop            table $&#123;qytab&#125;_ext_a_b_c830;</span><br><span class="line">CREATE EXTERNAL TABLE $&#123;qytab&#125;_ext_a_b_c830 sameas $&#123;qytab&#125;</span><br><span class="line">USING</span><br><span class="line">(DATAFILES(&quot;DISK:/db/app02/trey_qy/external_table/$&#123;qytab&#125;.unl&quot;),</span><br><span class="line">FORMAT &#x27;DELIMITED&#x27;, DELIMITER &#x27;|&#x27;</span><br><span class="line">);</span><br><span class="line">set pdqpriority 96;</span><br><span class="line">--set isolation dirty read;</span><br><span class="line">set environment IFX_BATCHEDREAD_TABLE &#x27;1&#x27;;</span><br><span class="line">INSERT INTO $&#123;qytab&#125;_ext_a_b_c830  SELECT * FROM $&#123;qytab&#125;;</span><br><span class="line">!</span><br><span class="line">done</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">执行外部表导出</span></span><br><span class="line">nohup time sh wwexp.sh &amp;</span><br><span class="line"></span><br><span class="line">mv nohup.out nohup.out_exp</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">-----导出时的报错插曲</span></span><br><span class="line"><span class="meta prompt_">nx7420b#</span><span class="language-bash">[/db/app02/trey_qy]<span class="built_in">cat</span> nohup.out |<span class="built_in">sort</span> |<span class="built_in">uniq</span> -c |<span class="built_in">sort</span> |awk <span class="string">&#x27;$2~/:/&#x27;</span></span></span><br><span class="line">   2   602: Cannot open blob.</span><br><span class="line">   2   770: Bad fragment id specified. </span><br><span class="line"><span class="meta prompt_">nx7420b#</span><span class="language-bash">[/db/app02/trey_qy]<span class="built_in">cat</span> nohup.out |<span class="built_in">sort</span> |<span class="built_in">uniq</span> -c |<span class="built_in">sort</span> |grep -i err</span> </span><br><span class="line">   2 Error in line 1</span><br><span class="line"><span class="meta prompt_">nx7420b#</span><span class="language-bash">[/db/app02/trey_qy]</span></span><br><span class="line"></span><br><span class="line">大对象表：</span><br><span class="line">create table &quot;rb95518&quot;.app_biz_prplregist </span><br><span class="line">create table &quot;rb95518&quot;.app_biz_repsitdb </span><br><span class="line"></span><br><span class="line">select count(outcome) from app_biz_prplregist ;</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">06 新库创建外部表，导入数据 ==================================================================</span></span><br><span class="line">cat qy_tab_list |while read qytab</span><br><span class="line">do</span><br><span class="line">echo &quot;---  $qytab  -----------------------------------------------------------------------------------------&quot;</span><br><span class="line">time dbaccess wwqydb &lt;&lt;!</span><br><span class="line">--drop            table $&#123;qytab&#125;_ext_a_b_c830;</span><br><span class="line">CREATE EXTERNAL TABLE $&#123;qytab&#125;_ext_a_b_c830 sameas $&#123;qytab&#125;</span><br><span class="line">USING</span><br><span class="line">(DATAFILES(&quot;DISK:/db/app02/trey_qy/external_table/$&#123;qytab&#125;.unl&quot;),</span><br><span class="line">FORMAT &#x27;DELIMITED&#x27;, DELIMITER &#x27;|&#x27;</span><br><span class="line">);</span><br><span class="line">set pdqpriority 96;</span><br><span class="line">--set isolation dirty read;</span><br><span class="line">set environment IFX_BATCHEDREAD_TABLE &#x27;1&#x27;;</span><br><span class="line">INSERT INTO $&#123;qytab&#125;  SELECT * FROM $&#123;qytab&#125;_ext_a_b_c830;</span><br><span class="line">!</span><br><span class="line">done</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">执行外部表导入</span></span><br><span class="line">--如果数据量大，可以把表列表拆分 出来，分成多个文件并行。</span><br><span class="line">nohup time sh wwimp.sh &amp;</span><br><span class="line"></span><br><span class="line">mv nohup.out nohup.out_imp</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">07 执行其他DDL语句</span></span><br><span class="line">vi ww_db_oth.sql</span><br><span class="line">  set pdqpriority 96;</span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">--如果数据量大，可以把见索引的单独拿出来，分成多个文件并行。</span></span><br><span class="line">dbaccess wwqydb ww_db_oth.sql</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">08 修改数据库日志模式</span></span><br><span class="line">ontape -s -U wwqydb -t /dev/null</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">09 做统计更新</span></span><br></pre></td></tr></table></figure>

 
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